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United States Patent | 5,790,902 |
Mizouchi ,   et al. | August 4, 1998 |
A device includes a zoom lens having a focusing lens the position of which varies according to a zooming operation, a first moving part arranged to mechanically move the focusing lens according to the zooming operation, and a second moving part arranged to move the focusing lens in such a way as to electrically correct any shift of focus that results from the movement of the focusing lens caused by the first moving part.
Inventors: | Mizouchi; Satoru (Kanagawa-ken, JP); Kato; Masatake (Tokyo, JP); Eguchi; Masaharu (Kanagawa-ken, JP); Ogawa; Hideki (Tokyo, JP) |
Assignee: | Canon Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 790588 |
Filed: | January 29, 1997 |
Sep 02, 1993[JP] | 5-243659 | |
Sep 02, 1993[JP] | 5-243660 | |
Sep 02, 1993[JP] | 5-243661 |
Current U.S. Class: | 396/142; 396/71; 396/79; 396/91 |
Intern'l Class: | G01J 001/20 |
Field of Search: | 396/71,73,79,81,82,85,89,90,91,93,142 |
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